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* [PATCH edk2-platforms v1] Platform/ARM: Map Platform Boot Timeout PCD to global NV variable
@ 2018-04-30 16:29 Alexei Fedorov
  2018-05-01 11:48 ` Ard Biesheuvel
  0 siblings, 1 reply; 2+ messages in thread
From: Alexei Fedorov @ 2018-04-30 16:29 UTC (permalink / raw)
  To: edk2-devel
  Cc: Arvind Chauhan, Daniil Egranov, Thomas Panakamattam Abraham,
	Ard.Biesheuvel, Leif.Lindholm, Michael.d.kinney, Matteo.Carlini,
	Stephanie.Hughes-Fitt, nd, Evan.Lloyd, Sami.Mujawar

From: Alexei Fedorov <Alexei.Fedorov@arm.com>

Table 13 of UEFI Specification 2.7A describes Timeout
global variable as NV (non-volatile), however
gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut
is defined in [PcdsFixedAtBuild.common] section of
edk2-platforms\Platform\ARM\VExpressPkg\ArmVExpress.dsc.inc.
This prevents Timeout value from being persistent across
resets and power cycles, see BdsEntry() code
in MdeModulePkg\Universal\BdsDxe\BdsEntry.c:
  //
  // Initialize L"Timeout" EFI global variable.
  //
  BootTimeOut = PcdGet16 (PcdPlatformBootTimeOut);

This patch fixes the above issue by mapping PcdPlatformBootTimeOut
to global NV variable "Timeout":
[PcdsDynamicHii.common.DEFAULT]
  gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|L"Timeout"|gEfiGlobalVariableGuid|0x0|10

Change-Id: I8ab8854c0789da206bf821391c67007259e48361
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Reviewed-by:   Evan Lloyd <Evan.Lloyd@arm.com>
---
All the changes can be reviewed at:
https://github.com/AlexeiFedorov/edk2-platforms/tree/202_timeout_value_v1

Notes:
    v1:
    - Map PcdPlatformBootTimeOut to global NV Timeout variable [Alexei]

 Platform/ARM/VExpressPkg/ArmVExpress.dsc.inc | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Platform/ARM/VExpressPkg/ArmVExpress.dsc.inc b/Platform/ARM/VExpressPkg/ArmVExpress.dsc.inc
index 7cb47937329efa1944ec4c156e2be995a755ce6f..de201b0c81d020e1e06ee320cf0f14f186723657 100644
--- a/Platform/ARM/VExpressPkg/ArmVExpress.dsc.inc
+++ b/Platform/ARM/VExpressPkg/ArmVExpress.dsc.inc
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2011-2015, ARM Limited. All rights reserved.
+#  Copyright (c) 2011-2018, ARM Limited. All rights reserved.
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -353,8 +353,6 @@ [PcdsFixedAtBuild.common]
   # List of Device Paths that support BootMonFs
   gArmBootMonFsTokenSpaceGuid.PcdBootMonFsSupportedDevicePaths|L"VenHw(E7223039-5836-41E1-B542-D7EC736C5E59);VenHw(1F15DA3C-37FF-4070-B471-BB4AF12A724A)"
 
-  gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|10
-
   # RunAxf support via Dynamic Shell Command protocol
   # We want to use the Shell Libraries but don't want it to initialise
   # automatically. We initialise the libraries when the command is called by the
@@ -399,6 +397,9 @@ [PcdsFixedAtBuild.common]
   #
   gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack|TRUE
 
+[PcdsDynamicHii.common.DEFAULT]
+  gEfiMdePkgTokenSpaceGuid.PcdPlatformBootTimeOut|L"Timeout"|gEfiGlobalVariableGuid|0x0|10
+
 [Components.common]
   MdeModulePkg/Universal/PCD/Dxe/Pcd.inf {
     <LibraryClasses>
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'




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2018-04-30 16:29 [PATCH edk2-platforms v1] Platform/ARM: Map Platform Boot Timeout PCD to global NV variable Alexei Fedorov
2018-05-01 11:48 ` Ard Biesheuvel

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